Cisco Security has detected significant activity related to spam email messages that claim to contain a shipping notification from FedEx for the recipient. The text in the email message attempts to convince the recipient to open the attachment for details. However, the .zip attachment contains a malicious .exe file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID8091 and RuleID8091KVR) may contain the following files:

The Track_7810-45294-6274.exe file in the Track_7810-45294-6274.zip attachment has a file size of 119,996 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x97c3aca9dffc4ae9729dc795e6acb955

The Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,549 bytes. The MD5 checksum is the following string: 0x267193BB676E405ECAD37D8662663F65

A variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has an approximate file size of 117,667 bytes. The MD5 checksum is not available.

A third variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 168,073 bytes. The MD5 checksum is the following string: 0x1663F9763C22772CAB9111B2FEAAD9AB

A fourth variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 176,275 bytes. The MD5 checksum is the following string: 0xA51B5F63CE602A7FFE148A907F4598D0

A fifth vaiant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,541 bytes. The MD5 checksum is the following string: 0xBB94D25B557E3D42EDA5C5B90A72CB62

A sixth variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 184,451 bytes. The MD5 checksum is the following string: 0xADD6F6FBD8BB958A7E0E1244FE3E02E7

A seventh variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,526 bytes. The MD5 checksum is the following string: 0x6C44C1371987406CFF2C08CDFF9D7380

A eighth variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,524 bytes. The MD5 checksum is the following string: 0x17427ED40F98530CEE9434F713E3DA6B

A ninth variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 176,238 bytes. The MD5 checksum is the following string: 0x308E03FECF0D998995C371E900A2DD80

A 10th variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 176,238 bytes. The MD5 checksum is the following string: 0x9492ADDA4614192C335763EC49C96CA3

A 11th variant of the Track_1764-78103-4529.exe file in the Track_1764-78103-4529.zip attachment has a file size of 176,257 bytes. The MD5 checksum is the following string: 0xA74417F6AD9946FBC6EB85BCA38F7D63

The Track_7632-96556-9000.exe file in the Track_1764-78103-4529.zip attachment has a file size of 167,823 bytes. The MD5 checksum is the following string: x4A84F3C3D143450B61D87F4909A35523

The Track_4153-89512-4620.exe file in the Track_1764-78103-4529.zip attachment has a file size of 167,824 bytes. The MD5 checksum is the following string: 0x6B5930867F45A2BA0122E60F96867A76

The Track_8233-16848-7306.exe file in the Track_1764-78103-4529.zip attachment has a file size of 159,545 bytes. The MD5 checksum is the following string: 0xA2A3A653F85E82379B7505B7C7E0A188

The Track_3972-38400-9487.exe file in the Track_1764-78103-4529.zip attachment has a file size of 159,545 bytes. The MD5 checksum is the following string: 0x6BB96473EC08E8D72DBA80D15AFF3FE3

The Track_7359-60581-2160.exe file in the Track_1764-78103-4529.zip attachment has a file size of 159,545 bytes. The MD5 checksum is the following string: 0x520D81A262D9CB271BC9B554B45114CC

The Track_2708-34838-4178.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,217 bytes. The MD5 checksum is the following string: 0xFC2C90470C270D123DE4410DEB1EBD88

The Track_4033-88575-1380.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,217 bytes. The MD5 checksum is the following string: 0xE9D106F35E580BA5B22667F8A303F17E

The Track_3565-10463-6947.exe file in the Track_1764-78103-4529.zip attachment has an approximate file size of 138,362 bytes. The MD5 checksum is not available.

The Track_2520-10330-2886.exe file in the Track_1764-78103-4529.zip attachment has a file size of 167,737 bytes. The MD5 checksum is the following string: 0xF60AE950CD00468F3E26A118B0AAE8BF

The Track_1243-69578-5070.exe file in the Track_1764-78103-4529.zip attachment has a file size of 163,641 bytes. The MD5 checksum is the following string: 0xCD286B871FED684D6B44CE27E95B11BA

The Track_5651-98126-8924.exe file in the Track_1764-78103-4529.zip attachment has a file size of 188,217 bytes. The MD5 checksum is the following string: 0x4A8B7DEBB0A50EE2C32FDDCEE03CDFC8

The following text is a sample of the email message that is associated with this threat outbreak:

Dear Customer, Your shipment has arrived at the post office on 30 December 2013. Our courier team was unable to deliver the package to you. To receive your shipment please print the attached receipt and go to the nearest office. Best Regards, The FedEx Team.

Cisco Security analysts examine real-world email traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global email security threats and trends. Cisco will continue to monitor this threat and automatically adapt systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.

Cisco security appliances protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Email that is managed by Cisco and end users who are protected by Cisco Web Security Appliances will not be impacted by these attacks. Cisco security appliances are automatically updated to prevent both spam email and hostile web URLs from being passed to the end user.

The security vulnerability applies to the following combinations of products.

Primary Products:

IntelliShield

Threat Outbreak Alert

Original Release Base

Associated Products:

N/A

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